A PJ38 will fit in a stock LT250R intake so I bet it'll fit in a stock TRX intake too. Or maybe find a CR250 intake. Don't those fit the ATC and TRX's? The PJ38 is a good carb. Kinda finicky but a good carb. I have a quad vent PJ for my zuki I'm waiting for summer to get here so I can try it out